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ASTM D4031-95a

(Test Method)

Standard Test Method for Bulk Properties of Textured Yarns

Standard Test Method for Bulk Properties of Textured Yarns

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1.1 This test method covers the measurement of the change in length of a tensioned skein of textured yarn due to change in crimp characteristics brought about by exposure to wet or dry heat. The change in length, depending on procedure, is a measure of skein shrinkage, crimp contraction, bulk shrinkage, or crimp recovery.
1.2 This test method applies to crimped, continuous multifilament yarns ranging from 1.7 to 88.9 tex (15 to 800 denier).
1.3 Three conditions are provided for crimp development mediums, and loading routines are provided to be used on the yarn skeins to allow determination of yarn bulk by several different procedures.
1.4 The values stated in either SI units or inch-pound units are to be regarded as standard. Within the text, the inch-pound units are shown in parentheses. The values stated in each system are not exact equivalent; therefore, each system shall be used independently of the other. Combining values from the two systems may result in noncomformance with the specification.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
09-Sep-2001
ICS
59.080.20 - Yarns
Technical Committee
D13 - Textiles
Drafting Committee
D13.58 - Yarns and Fibers
Current Stage
Ref Project

Relations

Replaced By
ASTM D4031-01 - Standard Test Method for Bulk Properties of Textured Yarns
Effective Date
10-Sep-2001

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ASTM D4031-95a - Standard Test Method for Bulk Properties of Textured YarnsASTM D4031-95a - Standard Test Method for Bulk Properties of Textured Yarns
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ASTM D4031-95a - Standard Test Method for Bulk Properties of Textured Yarns
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Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn. Contact ASTM International (www.astm.org) for the latest information.
Designation: D 4031 – 95a
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
1
Bulk Properties of Textured Yarns
This standard is issued under the fixed designation D 4031; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Terminology
1.1 This test method covers the measurement of the change 3.1 Definitions:
in length of a tensioned skein of textured yarn due to change in 3.1.1 bulk shrinkage, n—a measure of potential stretch and
crimp characteristics brought about by exposure to wet or dry power of stretch yarns or a measure of bulk of textured-set
heat. The change in length, depending on procedure, is a yarns.
measure of skein shrinkage, crimp contraction, bulk shrinkage, 3.1.2 crimp contraction, n—an indicator of crimp capacity
or crimp recovery. or a characterization of a yarn’s ability to contract under
1.2 This test method is limited to crimped, continuous tension.
multifilament yarns ranging from 1.7 to 888.9 tex (15 to 8000 3.1.3 crimp development medium, n—for testing of textured
denier). yarn, an environment that allows the temporary set of fiber
1.3 Three conditions are provided for crimp development crimp to be overcome and that allows the filaments to assume
mediums, and loading routines are provided to be used on the their permanently set configuration.
yarn skeins to allow determination of yarn bulk by several 3.1.4 crimp recovery, n—a measure of the ability of a yarn
different procedures. to return to its original crimped state after being subjected to
1.4 This standard provides the values in both inch-pound tension.
units and SI units. Inch-pound units is the technically correct 3.1.5 skein shrinkage, n—a measure of true or intrinsic yarn
name for the customary units used in the United States. SI units shrinkage not including crimp contraction.
is the technically correct name for the system of metric units 3.1.6 For definitions of other textile terms used in these
known as the International System of Units. The values stated methods, refer to Terminology D 123.
in either acceptable metric units or in other units shall be
4. Summary of Test Method
regarded separately as standard. The values stated in each
system must be used independently of the other, without 4.1 A skein of yarn of a prescribed size (linear density) is
subjected to a crimp development medium using a specified
combining in any way.
1.5 This standard does not purport to address all of the loading routine. As the crimp is developed or shrinkage occurs
in the yarn, the skein changes in length. The lengths of the
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- skein under specified tension forces are used to calculate the
value of bulk shrinkage, crimp contraction, skein shrinkage, or
priate safety and health practices and determine the applica-
crimp recovery.
bility of regulatory limitations prior to use.
4.2 The test method offers three options for loading routine
2. Referenced Documents
of the yarn skeins. Loading routines consist of using low-
2.1 ASTM Standards: tension forces (light loads of 0.04 to 0.98 mN/tex (0.5 to 11
2
D 123 Terminology Relating to Textiles mgf/den)) that extend without removing crimp, and high-
D 1059 Test Method for Yarn Number Based on Short- tension forces (heavy loads of 8.8 mN/tex (100 mgf/den)) that
2
Length Specimens remove crimp without elongating the yarn. A list of weights to
2
D 1776 Practice for Conditioning Textiles for Testing be used is given in Table 1. Weight option combinations are
D 1907 Test Method for Yarn Number by the Skein detailed in Table 2.
2
Method
2 5. Significance and Use
D 2258 Practice for Sampling Yarn for Testing
5.1 The values obtained by this test method should not be
used to predict similar properties in fabricated structures except
1
This test method is under the jurisdiction of ASTM Committee D-13 on Textiles
in narrow well-defined comparisons, such as 16.7 tex (150-
and is the direct responsibility of Subcommittee D13.58 on Yarn Test Methods,
denier) polyester from the same feed yarn merge and textured
General.
on the same machine type. Attempts to relate yarn performance
Current edition approved May 15 and June 15, 1995. Published August 1995.
e1
Originally published as D 4031 – 81. Last previous edition D 4031 – 81 (1987) .
to fabric performance might result in poor correlations unless
2
Annual Book of ASTM Standards, Vol 07.01.
1

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5.1.1 If there are differences or practical significance between reported test results for two laboratories (or more), comparative tests should be performed to determine if there is a statistical bias between them, using competent statistical assistance. As a minimum, the test samples to be used are as homogeneous as possible, are drawn from the material from which the disparate test results are obtained, and are assigned randomly in equal numbers to each laboratory for testing. Other materials with established test values may be used for this purpose. The test results from the two laboratories should be compared using a statistical test for unpaired data, at a probability level chosen prior to the testing series. If a bias is found, either its cause must be found and corrected, or future test results must be adjusted in consideration of the known bias.  
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5.1 This is a quick method used for the determination of the approximate yarn number of short-length specimens taken from packages or fabrics.  
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5.1 Test Method D6774, for determining maximum total contraction, crimp, and residual fiber shrinkage in textured filament yarns is suitable for acceptance testing of commercial shipments.  
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5.1 Test Method D1423 for testing twist in yarns by direct-counting is considered satisfactory for acceptance testing of commercial shipments because current estimates of between-laboratory precision are acceptable and the method has been used extensively in the trade for acceptance testing.  
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5.3 The twist in a yarn before it is packaged may be different from that of the yarn after it has been withdrawn from the package because of changes in tension and the effect of the method of withdrawal. If the yarn is withdrawn over-end, a slight increase or decrease in twist will take place, depending upon the direction of the twist in the yarn, the direction of winding on the package, and the length of the wrap on the package.  
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1.1 This test method covers the determination of the amount and direction of twist at the completion of any stage of twisting in single (spun or filament), plied, cabled, or novelty (exclusive of long-term repeat patterns) yarns. The procedures are designed primarily for yarns in packages, but, with special precautions, they are applicable to yarns taken from fabrics. The procedure for spun yarn in 9.2 is also applicable to rovings.  
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1.3 This test method is not intended for yarns that extend more than 5.0 % when tension is increased from 2.5 to 7.5 mN/tex [0.25 to 0.75 gf/tex]. Following the procedures of this test method for such yarns would be independent of the bias and precision determined for this test method. The report from such testing should include the tension used for this testing.  
1.4 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.
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Note 2: This test method has been evaluated for use in de...

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ASTM D6612-00(2022)(Test Method)
Standard Test Method for Yarn Number and Yarn Number Variability Using Automated Tester

SIGNIFICANCE AND USE
5.1 Test Method D6612 for yarn number and yarn number variability is satisfactory for acceptance of commercial shipments and is used in the trade.  
5.1.1 If there are differences of practical significance between the reported test results for two or more laboratories, comparative tests should be performed by those laboratories to determine if there is a statistical bias between them, using competent statistical assistance. As a minimum, samples used for each comparative tests should be as homogeneous as possible, drawn from the same lot of material as the samples that results in disparate results during initial testing, and randomly assigned in equal numbers to each laboratory. Other fabrics with established tests values are used for this purpose. The test results from the laboratories involved should be compared appropriate statistical analysis and a probability level chosen by the two parties before testing begins, at a probability level chosen prior to the testing series. If a bias is found, either its cause must be found and corrected, or future test results adjusted in consideration of the known bias.  
5.1.2 The average results from the two laboratories should be compared using appropriate statistical analysis and a probability level chosen by the two parties before the testing is begun. If a bias is found, either its cause must be found and corrected or the purchaser and the supplier must agree to interpret future test results with consideration to the known bias.  
5.2 Test Method D6612 also is used for the quality control of filament yarns.  
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Standard Practice for Sampling Yarn for Testing

SIGNIFICANCE AND USE
5.1 Assigning a value to any property of the material in a container or in a lot, consignment, or delivery involves a measurement process that includes both sampling and testing procedures. The correctness of the value assigned depends upon the variability due to testing and sampling plan. Even when the variability due to testing is minimized by carefully developed procedures, correct and consistent estimates of the true value of the property are possible only when the sampling procedure avoids systematic bias, minimizes variations due to sampling, and provides a laboratory sample of adequate size.  
5.2 Practice D2258 may not give the most efficient sampling plan that might be devised in special situations but does present a general procedure that gives satisfactory precision with an economical amount of sampling. Many plans that include stratified sampling can be found in textbooks and through the use of statistical software tools and calculators.  
5.2.1 If not specified by the purchaser, the manufacturer will define suitable production lots based on one or more of the following: supply lot, production shift/time segment, production equipment or production line, operator, designated shipment, production run, or a combination herein.  
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SCOPE
1.1 This practice describes a procedure for the division of shipments of yarn into test lots and the sampling of such lots for testing.  
1.1.1 This practice can be used for lot sample testing of yarns for both pre-fabric production and post-fabric production.  
1.2 This practice is applicable to single, plied, or cabled yarns, and cords, made of any fiber or mixture of fibers, and supported on any form of package, including beams.  
1.3 This practice also describes procedures for the sampling of yarn(s) removed from woven or knitted fabrics; however, when thus sampled, the yarns are usually not representative of entire shipments, as referred to in 1.1. Consequently, the resultant sampling can only be used to determine the characteristics of the yarn and is usually not used for acceptance testing. Moreover, it should be recognized that the characteristics of yarns from fabrics may be different than the characteristics of the same yarn(s), prior to being entered into the fabric manufacturing process.  
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.  
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical...

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ASTM
ASTM D3693-02(2021)(Specification)
Standard Specification for Labeled Length per Holder of Sewing Thread

ABSTRACT
This specification covers the requirements for the labeled lengths per holder of sewing threads of all materials. The test specimen is a thread holder whether a cone, tube, spool, ready-made bobbin, or any other holders. The observed length for all holders such as home sewing spools, ready-made bobbins, or all other holders which depends on the sampling size shall equal or exceed a certain percentage of the minimum allowable labeled length.
SCOPE
1.1 This specification covers requirements for the labeled lengths of sewing threads of all materials.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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ASTM D2731-21(Test Method)
Standard Test Method for Elastic Properties of Elastomeric Yarns (CRE Type Tensile Testing Machines)

SIGNIFICANCE AND USE
5.1 This test method is considered satisfactory for acceptance testing of commercial shipments since current estimates of between-laboratory precision are acceptable and the method is used extensively in the trade for acceptance testing.  
5.1.1 If there are differences of practical significance between reported test results for two laboratories (or more), comparative tests should be performed to determine if there is a statistical bias between them, using competent statistical assistance. As a minimum, use samples for such comparative tests that are as homogeneous as possible, drawn from the same lot of material as the samples that resulted in disparate results during initial testing, and randomly assigned in equal numbers to each laboratory. The test results from the laboratories involved should be compared using a statistical test for unpaired data, at a probability level chosen prior to the testing series. If bias is found, either its cause must be found and corrected, or future test results for that material must be adjusted in consideration of the known bias.  
5.2 Force at Specified Elongation (FASE) is a measure of the tensile force occurring while extending a textile material within specified limits. This characteristic of elastomeric yarn indicates the resistance that will have to be overcome by the wearer while putting on a garment made of the material and is also an indication of the garment's resistance to deformation caused by normal body movements during wear. The elongations used for these measurements are typically 100 %, 200 % and 300 %.  
5.3 Permanent Deformation (set) is a measure of the increase in length of an elastomeric yarn resulting from cyclic stretching and relaxation. The characteristic is a visible indication of the realignment of intermolecular bonds within the elastic material. As with stress decay, the amount of set increases with yarn extension; however, for any particular extension, little or no additional set takes place after...
SCOPE
1.1 This test method covers the determination of elastic properties of “as produced” elastomeric yarns made from rubber, spandex or other elastomers. Elastic properties include force at specified elongations, permanent deformation and stress decay. Other hysteresis related properties can be calculated.
Note 1: For a method designed specifically for testing rubber threads, refer to Test Method D2433.  
1.2 This test method is not applicable to covered, wrapped, or core-spun yarns or yarns spun from elastomeric staple.  
1.3 This test method is applicable to elastomeric yarns having a range of 40 to 3200 dtex (36 to 2900 denier).  
1.4 The values stated in either SI units or U.S. Customary units are to be regarded separately as standard. Within the text, the U.S. Customary units are in parentheses. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other.  
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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